X-Git-Url: https://git.mdrn.pl/librarian.git/blobdiff_plain/5b174651e7cadaa9c353cd247fbfcde41b012f3a..ee1f5f9be7d4e2bb843c01a118cc090ab97e6cc6:/librarian/epub.py
diff --git a/librarian/epub.py b/librarian/epub.py
index 139dd39..a0d9742 100644
--- a/librarian/epub.py
+++ b/librarian/epub.py
@@ -14,11 +14,36 @@ from lxml import etree
import zipfile
from librarian import XMLNamespace, RDFNS, DCNS, WLNS, XHTMLNS, NoDublinCore
+from librarian.parser import WLDocument
+#TODO: shouldn't be repeated here
NCXNS = XMLNamespace("http://www.daisy.org/z3986/2005/ncx/")
OPFNS = XMLNamespace("http://www.idpf.org/2007/opf")
+class DocProvider(object):
+ class DoesNotExist(Exception):
+ pass
+
+ def by_slug(self, slug):
+ raise NotImplemented
+
+ def __getitem__(self, slug):
+ return self.by_slug(slug)
+
+ def by_uri(self, uri):
+ return self.by_slug(uri.rsplit('/', 1)[1])
+
+
+class DirDocProvider(DocProvider):
+ def __init__(self, dir):
+ self.dir = dir
+ self.files = {}
+
+ def by_slug(self, slug):
+ return open(os.path.join(self.dir, '%s.xml' % slug))
+
+
def inner_xml(node):
""" returns node's text and children as a string
@@ -93,24 +118,26 @@ def replace_characters(node):
replace_characters(child)
-def find_annotations(annotations, source, part_number):
+def find_annotations(annotations, source, part_no):
for child in source:
if child.tag in ('pe', 'pa', 'pt', 'pr'):
annotation = deepcopy(child)
- annotation.set('number', str(len(annotations)+1))
- annotation.set('part', str(part_number))
+ number = str(len(annotations)+1)
+ annotation.set('number', number)
+ annotation.set('part', str(part_no))
annotation.tail = ''
annotations.append(annotation)
tail = child.tail
child.clear()
child.tail = tail
- child.text = str(len(annotations))
+ child.text = number
if child.tag not in ('extra', 'podtytul'):
- find_annotations(annotations, child, part_number)
+ find_annotations(annotations, child, part_no)
def replace_by_verse(tree):
""" Find stanzas and create new verses in place of a '/' character """
+
stanzas = tree.findall('.//' + WLNS('strofa'))
for node in stanzas:
for child_node in node:
@@ -137,6 +164,7 @@ def replace_by_verse(tree):
def add_to_manifest(manifest, partno):
""" Adds a node to the manifest section in content.opf file """
+
partstr = 'part%d' % partno
e = manifest.makeelement(OPFNS('item'), attrib={
'id': partstr,
@@ -148,84 +176,187 @@ def add_to_manifest(manifest, partno):
def add_to_spine(spine, partno):
""" Adds a node to the spine section in content.opf file """
+
e = spine.makeelement(OPFNS('itemref'), attrib={'idref': 'part%d' % partno});
spine.append(e)
-def add_nav_point(nav_map, counter, title, part_counter):
- nav_point = nav_map.makeelement(NCXNS('navPoint'))
- nav_point.set('id', 'NavPoint-%d' % counter)
- nav_point.set('playOrder', str(counter))
+class TOC(object):
+ def __init__(self, name=None, part_number=None):
+ self.children = []
+ self.name = name
+ self.part_number = part_number
+ self.sub_number = None
- nav_label = nav_map.makeelement(NCXNS('navLabel'))
- text = nav_map.makeelement(NCXNS('text'))
- text.text = title
- nav_label.append(text)
- nav_point.append(nav_label)
+ def add(self, name, part_number, level=0, is_part=True):
+ if level > 0 and self.children:
+ return self.children[-1].add(name, part_number, level-1, is_part)
+ else:
+ t = TOC(name)
+ t.part_number = part_number
+ self.children.append(t)
+ if not is_part:
+ t.sub_number = len(self.children) + 1
+ return t.sub_number
+
+ def append(self, toc):
+ self.children.append(toc)
+
+ def extend(self, toc):
+ self.children.extend(toc.children)
+
+ def depth(self):
+ if self.children:
+ return max((c.depth() for c in self.children)) + 1
+ else:
+ return 0
+
+ def write_to_xml(self, nav_map, counter):
+ for child in self.children:
+ nav_point = nav_map.makeelement(NCXNS('navPoint'))
+ nav_point.set('id', 'NavPoint-%d' % counter)
+ nav_point.set('playOrder', str(counter))
+
+ nav_label = nav_map.makeelement(NCXNS('navLabel'))
+ text = nav_map.makeelement(NCXNS('text'))
+ text.text = child.name
+ nav_label.append(text)
+ nav_point.append(nav_label)
+
+ content = nav_map.makeelement(NCXNS('content'))
+ src = 'part%d.html' % child.part_number
+ if child.sub_number is not None:
+ src += '#sub%d' % child.sub_number
+ content.set('src', src)
+ nav_point.append(content)
+ nav_map.append(nav_point)
+ counter = child.write_to_xml(nav_point, counter + 1)
+ return counter
+
+
+def chop(main_text):
+ """ divide main content of the XML file into chunks """
+
+ # prepare a container for each chunk
+ part_xml = etree.Element('utwor')
+ etree.SubElement(part_xml, 'master')
+ main_xml_part = part_xml[0] # master
- content = nav_map.makeelement(NCXNS('content'))
- content.set('src', 'part%d.html' % part_counter)
- nav_point.append(content)
+ last_node_part = False
+ for one_part in main_text:
+ name = one_part.tag
+ if name == 'naglowek_czesc':
+ yield part_xml
+ last_node_part = True
+ main_xml_part[:] = [deepcopy(one_part)]
+ elif not last_node_part and name in ("naglowek_rozdzial", "naglowek_akt", "srodtytul"):
+ yield part_xml
+ main_xml_part[:] = [deepcopy(one_part)]
+ else:
+ main_xml_part.append(deepcopy(one_part))
+ last_node_part = False
+ yield part_xml
- nav_map.append(nav_point)
+def transform_chunk(chunk_xml, chunk_no, annotations):
+ """ transforms one chunk, returns a HTML string and a TOC object """
-def add_nav_point2(nav_map, counter, title, part_counter, subcounter):
- nav_point = nav_map.makeelement(NCXNS('navPoint'))
- nav_point.set('id', 'NavPoint-%d' % counter)
- nav_point.set('playOrder', str(counter))
+ toc = TOC()
+ for element in chunk_xml[0]:
+ if element.tag in ("naglowek_czesc", "naglowek_rozdzial", "naglowek_akt", "srodtytul"):
+ toc.add(node_name(element), chunk_no)
+ elif element.tag in ('naglowek_podrozdzial', 'naglowek_scena'):
+ subnumber = toc.add(node_name(element), chunk_no, level=1, is_part=False)
+ element.set('sub', str(subnumber))
+ find_annotations(annotations, chunk_xml, chunk_no)
+ replace_by_verse(chunk_xml)
+ output_html = etree.tostring(xslt(chunk_xml, res('xsltScheme.xsl')), pretty_print=True)
+ return output_html, toc
- nav_label = nav_map.makeelement(NCXNS('navLabel'))
- text = nav_map.makeelement(NCXNS('text'))
- text.text = title
- nav_label.append(text)
- nav_point.append(nav_label)
- content = nav_map.makeelement(NCXNS('content'))
- content.set('src', 'part%d.html#sub%d' % (part_counter, subcounter))
- nav_point.append(content)
+def transform(provider, slug, output_file):
+ """ produces an epub
- nav_map[-1].append(nav_point)
+ provider is a DocProvider
+ output_file should be filelike object
+ """
+ def transform_file(input_xml, chunk_counter=1, first=True):
+ """ processes one input file and proceeds to its children """
-def transform(input_file, output_file):
- """ produces an epub
+ children = [child.text for child in input_xml.findall('.//'+DCNS('relation.hasPart'))]
- input_file and output_file should be filelike objects
- """
+ # every input file will have a TOC entry,
+ # pointing to starting chunk
+ toc = TOC(node_name(input_xml.find('.//'+DCNS('title'))), chunk_counter)
+ if first:
+ # write book title page
+ zip.writestr('OPS/title.html',
+ etree.tostring(xslt(input_xml, res('xsltTitle.xsl')), pretty_print=True))
+ elif children:
+ # write title page for every parent
+ zip.writestr('OPS/part%d.html' % chunk_counter,
+ etree.tostring(xslt(input_xml, res('xsltChunkTitle.xsl')), pretty_print=True))
+ add_to_manifest(manifest, chunk_counter)
+ add_to_spine(spine, chunk_counter)
+ chunk_counter += 1
+
+ if len(input_xml.getroot()) > 1:
+ # rdf before style master
+ main_text = input_xml.getroot()[1]
+ else:
+ # rdf in style master
+ main_text = input_xml.getroot()[0]
+ if main_text.tag == RDFNS('RDF'):
+ main_text = None
+
+ if main_text is not None:
+ replace_characters(main_text)
+
+ for chunk_no, chunk_xml in enumerate(chop(main_text), chunk_counter):
+ chunk_html, chunk_toc = transform_chunk(chunk_xml, chunk_counter, annotations)
+ toc.extend(chunk_toc)
+ zip.writestr('OPS/part%d.html' % chunk_counter, chunk_html)
+ add_to_manifest(manifest, chunk_counter)
+ add_to_spine(spine, chunk_counter)
+ chunk_counter += 1
+
+ if children:
+ for child in children:
+ child_xml = etree.parse(provider.by_uri(child))
+ child_toc, chunk_counter = transform_file(child_xml, chunk_counter, first=False)
+ toc.append(child_toc)
+
+ return toc, chunk_counter
- input_xml = etree.parse(input_file)
zip = zipfile.ZipFile(output_file, 'w', zipfile.ZIP_DEFLATED)
+ # write static elements
mime = zipfile.ZipInfo()
mime.filename = 'mimetype'
mime.compress_type = zipfile.ZIP_STORED
mime.extra = ''
zip.writestr(mime, 'application/epub+zip')
-
zip.writestr('META-INF/container.xml', '' \
'' \
'')
+ for fname in 'style.css', 'logo_wolnelektury.png':
+ zip.write(res(fname), os.path.join('OPS', fname))
- metadata_el = input_xml.find('.//'+RDFNS('Description'))
- if metadata_el is None:
+ # metadata from first file
+ input_xml = etree.parse(provider[slug])
+ metadata = input_xml.find('.//'+RDFNS('Description'))
+ if metadata is None:
raise NoDublinCore('Document has no DublinCore - which is required.')
- metadatasource = etree.ElementTree(metadata_el)
-
- opf = xslt(metadatasource, res('xsltContent.xsl'))
-
+ metadata = etree.ElementTree(metadata)
+ opf = xslt(metadata, res('xsltContent.xsl'))
manifest = opf.find('.//' + OPFNS('manifest'))
spine = opf.find('.//' + OPFNS('spine'))
- for fname in 'style.css', 'logo_wolnelektury.png':
- zip.write(res(fname), os.path.join('OPS', fname))
-
annotations = etree.Element('annotations')
- part_xml = etree.Element('utwor')
- etree.SubElement(part_xml, 'master')
toc_file = etree.fromstring('' \
@@ -236,89 +367,16 @@ def transform(input_file, output_file):
'' \
'PoczÄ
tek utworu' \
'')
+ nav_map = toc_file[-1]
- main_xml_part = part_xml[0] # byÅo [0][0], master
- nav_map = toc_file[-1] # byÅo [-1][-1]
- depth = 1 # navmap
-
- if len(input_xml.getroot()) > 1:
- # rdf before style master
- main_text = input_xml.getroot()[1]
- else:
- # rdf in style master
- main_text = input_xml.getroot()[0]
-
- replace_characters(main_text)
- zip.writestr('OPS/title.html',
- etree.tostring(xslt(input_xml, res('xsltTitle.xsl')), pretty_print=True))
-
- # Search for table of contents elements and book division
-
- stupid_i = stupid_j = stupid_k = 1
- last_node_part = False
- for one_part in main_text:
- name = one_part.tag
- if name in ("naglowek_czesc", "naglowek_rozdzial", "naglowek_akt", "srodtytul"):
- if name == "naglowek_czesc":
- stupid_k = 1
- last_node_part = True
- find_annotations(annotations, part_xml, stupid_j)
- replace_by_verse(part_xml)
- zip.writestr('OPS/part%d.html' % stupid_j,
- etree.tostring(xslt(part_xml, res('xsltScheme.xsl')), pretty_print=True))
- main_xml_part[:] = [deepcopy(one_part)]
- # add to manifest and spine
- add_to_manifest(manifest, stupid_j)
- add_to_spine(spine, stupid_j)
- name_toc = node_name(one_part)
- # build table of contents
- # i+2 because of title page
- add_nav_point(nav_map, stupid_i+2, name_toc, stupid_j + 1)
- stupid_i += 1
- stupid_j += 1
- else:
- if last_node_part:
- main_xml_part.append(one_part)
- last_node_part = False
- name_toc = node_name(one_part)
- add_nav_point(nav_map, stupid_i + 1, name_toc, stupid_j)
- else:
- stupid_k = 1
- find_annotations(annotations, part_xml, stupid_j)
- replace_by_verse(part_xml)
- zip.writestr('OPS/part%d.html' % stupid_j,
- etree.tostring(xslt(part_xml, res('xsltScheme.xsl')), pretty_print=True))
- # start building a new part
- main_xml_part[:] = [deepcopy(one_part)]
- add_to_manifest(manifest, stupid_j)
- add_to_spine(spine, stupid_j)
- name_toc = node_name(one_part)
- add_nav_point(nav_map, stupid_i + 2, name_toc, stupid_j + 1) # title page
- stupid_j += 1
- stupid_i += 1
- else:
- if name in ('naglowek_podrozdzial', 'naglowek_scena'):
- depth = 2
- name_toc = node_name(one_part)
- add_nav_point2(nav_map, stupid_i + 2, name_toc, stupid_j, stupid_k)
- one_part.set('sub', str(stupid_k))
- stupid_k += 1
- stupid_i += 1
- main_xml_part.append(deepcopy(one_part))
- last_node_part = False
- find_annotations(annotations, part_xml, stupid_j)
- replace_by_verse(part_xml)
- add_to_manifest(manifest, stupid_j)
- add_to_spine(spine, stupid_j)
-
- zip.writestr('OPS/part%d.html' % stupid_j,
- etree.tostring(xslt(part_xml, res('xsltScheme.xsl')), pretty_print=True))
+ toc, chunk_counter = transform_file(input_xml)
+ toc_counter = toc.write_to_xml(nav_map, 3) # we already have 2 navpoints
# Last modifications in container files and EPUB creation
if len(annotations) > 0:
nav_map.append(etree.fromstring(
'Przypisy'\
- '' % {'i':stupid_i+2}))
+ '' % {'i': toc_counter}))
manifest.append(etree.fromstring(
'